Features
•
Compatible with MCS
®
-51 Products
•
12K Bytes of In-System Programmable (ISP) Flash Program Memory
– SPI Serial Interface for Program Downloading
– Endurance: 10,000 Write/Erase Cycles
•
2K Bytes EEPROM Data Memory
– Endurance: 100,000 Write/Erase Cycles
•
64-byte User Signature Array
•
2.7V to 5.5V Operating Range
•
Fully Static Operation: 0 Hz to 24 MHz (in x1 and x2 Modes)
•
Three-level Program Memory Lock
•
256 x 8-bit Internal RAM
•
32 Programmable I/O Lines
•
Three 16-bit Timer/Counters
•
Nine Interrupt Sources
•
Enhanced UART Serial Port with Framing Error Detection and Automatic
Address Recognition
•
Enhanced SPI (Double Write/Read Buffered) Serial Interface
•
Low-power Idle and Power-down Modes
•
Interrupt Recovery from Power-down Mode
•
Programmable Watchdog Timer
•
Dual Data Pointer
•
Power-off Flag
•
Flexible ISP Programming (Byte and Page Modes)
– Page Mode: 64 Bytes/Page for Code Memory, 32 Bytes/Page for Data Memory
•
Four-level Enhanced Interrupt Controller
•
Programmable and Fuseable x2 Clock Option
•
Internal Power-on Reset
•
42-pin PDIP Package Option for Reduced EMC Emission
•
Green (Pb/Halide-free) Packaging Option
1. Description
The AT89S8253 is a low-power, high-performance CMOS 8-bit microcontroller with
12K bytes of In-System Programmable (ISP) Flash program memory and 2K bytes of
EEPROM data memory. The device is manufactured using Atmel’s high-density non-
volatile memory technology and is compatible with the industry-standard MCS-51
instruction set and pinout. The on-chip downloadable Flash allows the program mem-
ory to be reprogrammed in-system through an SPI serial interface or by a
conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU
with downloadable Flash on a monolithic chip, the Atmel AT89S8253 is a powerful
microcontroller which provides a highly-flexible and cost-effective solution to many
embedded control applications.
3286K–MICRO–12/06
8-bit
Microcontroller
with 12K Bytes
Flash and 2K
Bytes EEPROM
AT89S8253
